Clock pendulums



(No Model.)

J. W. WILLIAMS. MECHANISM FOR. REGULATING OLOGK PENDULUMS. No. 256,938.Patented Apr.25, 1882.

a WITNESSES: a

Rm. WW.

UNITED STATES PATENT OFFICE.

JOHN FIVILLIAMS, OF NEW YORK, N. Y.

MECHANISM FOR REGULATING CLOCK-PENDULUMS.

SPECIFICATION forming part of Letters Patent No. 256,938, dated April25, 1882.

(No model.)

To all whom it may concern Be it known that I, JOHN V. \VILLIAMS, of thecity, county, and State of New York, have invented certain new anduseful Improvements in Mechanisms for Regulating Clock-Pendulums, ofwhich the following is a specification.

This invention has reference to an improved mechanism for regulating thepcndulums of clocks from the central arbor ofthe same; and

the invention consists of a pinion placed upon the central arbor back ofthe dial and provided with an arm which passes along the socket of thehour-hand to the front part or" the dial, the pinion meshing with aguided rack-piece which carries the movable stud of the pendulum-rod, soas to adjust the same toward or away from the upper fixed stud of thesame.

In the accompanyingdrawings, Figure 1 represents a front view with myimproved pend ulum-regulating mechanism. Fig. 2 is a detail front viewof the regulating mechanism with the dial removed, and Fig. 3 is avertical transverse section of the same on line w m, Fig. 2.

Similar letters of reference imlicate corresponding parts.

Ain the drawings represents the central arbor ot' a commonclock-movement, the latter being provided with an escapcment-wheel andanchor at the upper part of the dial, in the nature of French clocks.

Upon the central arbor, A, back of the dial, is placed a loosely-turningpinion or toothed segment, B, which is retained in position on the frontpart of the movement and provided with a fixed arm, (I, which extendsalong the socket of the hour-hand to a point above the dial-plate, whereit is bent outwardly, so as to form a kind of handle or pointer, wherebythe pinion may be turned around the arbor. The

pinion B meshes with a rack-piece, O, which is guided by longitudinalslots 0 on fixed studs 6' of the front plate of the clock-movement,

the rack-piececarrying at the lower part a slotted stud, f, which movesvertically toward or away from the fixed upper stud,f, of thependulum-rod D. The movable stud f is split so as to engage theflattened upper end of the pendulum-rod.

By means of the fixed arm (I of the pinion B the movable stud f of thependulum rod may be adjusted toward or away from the fixed stud Z) ofthe upper end of the pendulumrod, and thereby the length'ot' stroke ofthe pendulum increased or decreased without adjusting the ball on thependulum-rod, as now customary in this class of clocks. Asmall graduatedscale may be arranged on the dial below the end of the pointer (I, so asto facilitate the adjustment of the pendulum to any desired degreerequired. By this means an easily-operated and simple attachment forcommon clock-movements is provided, which permits the adjustment of thependulum so as to regulate the length of the stroke to a nicety in amore convenient manner than by adjusting the ball, and at less expensethan by the bevel-gear and screw adjustment of French clocks.

Having thus described my invention, I claim I as new and desire tosecure by Letters Patent- As an improvement in clocks, the combination,with the center arbor, of an axially-turning pinion or toothed segmenthaving a fixed pointer-arm bent over the dial, with a verti' callysliding and guided rack carrying a spli. movable stud, and with apendulumrod suspended from a fixed stud above the movable stud,substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

JOHN IV. \VILLIAMS.

Witnesses:

PAUL GOEPEL, CARL KARI.

